Drill for mining purposes.



.No. 799,880. PATENTED SEPT. 19, 905.

. J. TONGE, JR.

DRILL FOR MINING PURPOSES. APPLIOATiON FILED NOV. 6,1903.

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PATENTE-D SEPT. 19, 1905.

J. T0NGB', JR. DRILL FORMINING PURPOSES.

APPLICATION FILED NOV. 6', 1903.

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' warren snares Parana orrion.

JAMES TONGE, JR, OF WESTHOUGHTON, NEAR BOLTON, ENGLAND.

beat me rename PURPOSES.

Specification of Letters gRatent.

Patented sept. 19, 1905.

Application filed November 6, 1903. Serial No. 180.033.

-in Drills for 'Mining Purposes, of which the following description, which refers to the accompanying sheets of drawings, isa specification. g

My invention relates. to drills for mining purposes, and especially to such as are used for the boring or cutting of openings .or holes in coal or like minerals for allowing the insertion therein of cartridges or other devices for breaking down said minerals or for otherwise acting upon them; and my said invention has for its object the production of; a tubular drill which will cut an annular or cylindrical opening around a central core and which will be enabled to efficiently-remove the refuseor cuttings therefrom, so that it or they willnotinterfere with its rotary cutting operations, while I may further form the cutting edges so that they are removable for sharpening purposes or for interchangement with other cutters .as'an'd whenever desired or found necessary.

I also make thedrillin parts,--so that one may be readily secured to the other andas readily detached therefrom for purposes hereinafter explained. Y

In the accompanying sheets of drawings, which are illustrative of my invention Figure 1 is a side elevation, drawn to a reduced scale, of a drill showing my improved construction. Figs.2 and 3 are end and side elevations of the cutting end of adrill, drawn toa larger scale than Fig. 1. Figs. I and 5 are similar views to Figs. 2 and 3,'respectively, and drawn to the I same scale, but are illustrative of one form of detachable cutters Figs. 6 and 7 are also similar views to Figs. 3 and 4;, respectively, and show another form ofdetachable cutter. Fig. 8 is a sectional side elevation of a drill, showing the formation of a particular-part, as hereinafter explained. Figs. 9 and 10 are perspective views showing the cutters used in connection with the drill illustrated by Figs. 6 and 7 in detail.

In carrying my invention into effect I form the body part a of the drill of a tubular or cylindrical shape with its cutting edges '6 c at one end, while its other end (5 is prepared to be received by any Well-known devices that I maybe used for transmitting rotary motion to it. Its cutting edges 6 c are formed so that they'will respectively cut the outer and inner circumferences of the cylindrical passage for the entrance of. the body a, whilethe volute flanges f as the drill rotates carry awaythe refuse or cuttings from said cutters b c, leav ing the core of mineral Within the body part a. To produce the volute flanges f, I cut the walls of the, body part a at the three places 2, 3, and 4 and then bend the intervening part so that it will project radially from said body para-a, as shown by the several figures, or the.volute flanges may be formed separate and be riveted or otherwise secured thereto. I may bend the volute flanges f so that they will extend within the body part a, as shown by Fig. 8, in which case the cuttings or refuse would travel within the part a and be ejected therefrom through openings 5 in the end piece (Z. r

The cutting edges 6 c are formed to be detachable by constructing them on the annular piece 9, "(shown by Figs. 4 and 5,);which' is made to take over the part a, to which is attached a holding-pin lb, which takes into the slot 7,2,"foi'med in the piece 9, thus securing same in position.

In cases where it is desired that the cutting edges 6 0 should be of very hardened steel or other metal Imake them separate from each other, as shown by Figs. 6, 7, 9, and 10, and in order to secure these to. the body part a I form my volute flanges f near the extremity of said part a and in these volute flanges f I form openings m (shown in broken'lines, Fig.

6 )toreceive the stems p of the cutters b c,

into which they are driven and where they are held by friction or by their attenuated ends .3 being bent into the openings 6, made in said body part a, their detachment therefrom being effected, on the onehand, by simply being. struck, as with a hammer, at their form volute flanges, and detachable cutting means carried by said body.

5. A drill comprising a tubular body provided with sectional or interrupted volute flanges, and detachable cutting means carried by said body.

6. Adrill comprising a tubular body provided with volute flanges, a plurality of said.

flanges being slotted, and independent cutters provided with stems adapted to pass through said slotted flanges.

7. A drill comprising-a tubular body provided with volute flanges, a plurality of said flanges being slotted. and cutters provided with stems adapted to project through said slotted flanges, said tubular body being provided with holes or openings into which the ends of said stems are bent.

in testimony whereof l have aflixed my signature in-presence of two witnesses.

JAMES TONGE, JUNIOR. Witnesses:

SAMUEL HEY, JOHN WHITEHEAD. 

